6.4.6
Replace the 1 µm-post treatment cartridge
1. Close the tap water valve.
2. Close the storage tank valve.
3. Open the purified water valve to depressurize the network. The SOURCE light of the
electronic unit is now on. Let the purified water valve opened.
4. Turn off the water purifier by unplugging the power plug.
5. Remove the post-treatment filter from its two plastic stirrups (Figure 11).
6. Disconnect both the outlet and the inlet pipes connected respectively to top and the bottom
couplings of the post-treatment filter (Figure 12).
7. Remove the used filter. Insert the new filter in its two plastic stirrups respecting the right way
of the water flow (arrow on the label) (Figure 13).
8. Reconnect both outlet and inlet pipes to the respective couplings of the filter.
9. Wipe off the water on the water purifier chassis to quickly detect a possible leak during the
starting up.
10. Open the tap water valve.
11. Re-plug the power plug. The POWER, PUMP and FLUSH lights are on: the water purifier is
starting a 2-minute rinse cycle of the reverse osmose membrane. Rinse is over when the
FLUSH light is off: the water purifier is producing purified water.
12. Open the storage tank valve.
13. Wait until all the filter holders are full of water. After a while, the water will come to the
purified water valve: let flowing 3 to 4 liters to correctly drain the system. In the case that
you replaced the ion-exchange resin, measure the conductivity of the purified water. It
should be close to 0 µS/cm.
14. Close the purified water valve. The water purifier is now operational.
O-Classic
operator’s manual
version: 20.01.22
22
Figure 11
Figure 12
Figure 13
